Resolving dimensionality problems with WHOQOL-BREF item responses
Article
Article Title | Resolving dimensionality problems with WHOQOL-BREF item responses |
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ERA Journal ID | 6106 |
Article Category | Article |
Authors | Perera, Harsha N. (Author), Izadikhah, Zahra (Author), O'Connor, Peter (Author) and McIlveen, Peter (Author) |
Journal Title | Assessment |
Journal Citation | 25 (8), pp. 1014-1025 |
Number of Pages | 12 |
Year | 2018 |
Place of Publication | United States |
ISSN | 1073-1911 |
1552-3489 | |
Digital Object Identifier (DOI) | https://doi.org/10.1177/1073191116678925 |
Web Address (URL) | https://journals.sagepub.com/doi/10.1177/1073191116678925 |
Abstract | The World Health Organization Quality of Life Scale (WHOQOL-BREF) is predicated on a multidimensional perspective on quality of life (QOL); yet studies are unclear about the latent structure underlying responses. This article reports on a study conducted to investigate the structure of WHOQOL-BREF scores. Competing latent structures of the data were examined in a general population sample. In addition, the complete factorial invariance of the retained model was investigated across gender. We also investigated latent mean differences in the QOL dimensions over age as well as age by gender interactions effects. Based on responses to the WHOQOL-BREF, support was found for a bifactor exploratory structural equation modeling representation of the data. This measurement structure accounts for construct-relevant multidimensionality in item responses due to the presence of general and specific factors underlying the data and the fallibility of indictors as pure reflections of only the single constructs they are purported to measure. Furthermore, support was found for measurement and structural invariance across gender. Finally, evidence was obtained for a curvilinear relationship of age with QOL, characterized by a midlife nadir. Taken together, the results of the study yield important validation data for the WHOQOL-BREF and tentatively resolve the dimensionality issues in the measurement of QOL using this instrument. |
Keywords | QOL, bifactor models, ESEM, dimensionality |
ANZSRC Field of Research 2020 | 520599. Social and personality psychology not elsewhere classified |
520399. Clinical and health psychology not elsewhere classified | |
520105. Psychological methodology, design and analysis | |
Public Notes | Published version cannot be displayed due to copyright restrictions. Article copyrighted 2016, but published in 2018. |
Byline Affiliations | University of Nevada, United States |
School of Psychology and Counselling | |
Queensland University of Technology | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q515w/resolving-dimensionality-problems-with-whoqol-bref-item-responses
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